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Finding the Fourth Proportional to 86,715.71, 130,071.53 and 39,968.58

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Solution

The fourth proportional to 86,715.71, 130,071.53 and 39,968.58 is: 59,951.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,715.71 : 130,071.53 = 39,968.58 : x
  2. Step 2: Convert to fraction form
    86,715.71/130,071.53 = 39,968.58/x
  3. Step 3: Cross multiply
    86,715.71x = 130,071.53 × 39,968.58
  4. Step 4: Simplify right side
    86,715.71x = 5,198,774,452.45
  5. Step 5: Solve for x
    x = 5,198,774,452.45/86,715.71
  6. Step 6: Final answer
    x = 59,951.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.